S1 revision

Simplify by combining like terms:
5a + 2b - 3a + 4

• 8a + 2b + 4
• 2a + 2b + 4
• 8ab
• 4ab + 4

Simplify the expression: -5(x + 4)

• 5x + 4
• -5x + 4
• -5x - 20
• -5x + 20

Simplify the Expression: 2x + 3x - 12x

• 7x
• -7x
• -17x
• 17x

Simplify the Expression: 3(x - y + 5)

• 3x - 3y + 8
• 3xy + 15
• 3x + 3y + 8
• 3x - 3y + 15

r + 10r

• 11r

• -11r

• 9r

• -11

4a + 9 + a

• 5a + 9
• 14a
• 3a + 9
• 5a - 9

Work out the value of the following expressions when a = 3, b = 4 and c = 5.
a + b   

• 7
• 8
• 9
• 6

Work out the value of the following expressions when a = 3, b = 4 and c = 5.
2a

• 5
• 6
• 8
• 10

Work out the value of the following expressions when a = 3, b = 4 and c = 5.
3ab

• 10
• 12
• 15
• 36

Work out the value of the expression when x = 3, y = – 2 and z = – 4.
y + x – z     

• -5
• -3
• 3
• 5